B. Mann Consulting

The original website I used when my sister was visiting from Italy. The FAQ entry asking if the service is free has the following to say:

SendSMSnow.com is a free service for the following options: Send single sms, organize your phonebook, organize your groups, receive replies. If you send a text message to a group of people, we have a fee for each text message of 5 credits (1 credit is 1 cent).